Answer:
p-value (0.0208) is less than alpha = 0.05 reject H0.
Step-by-step explanation:
we have the following data:
sample size = n = 75
x, the number to evaluate is 45
the sample proportion would be: x / n = 45/75
p * = 0.6
Now, the null and alternative hypotheses are:
H0: P = 0.72
Ha: P no 72
two tailed test
statistic tes = z = (p * - p) / [(p * (1-p) / n)] ^ (1/2)
replacing we have:
z = (0.6 - 0.72) / [(0.72 * (1-0.72) / 75)] ^ (1/2)
z = -2.31
p-vaule = 2 * p (z <-2.31)
using z table, we get:
p-vaule = 2 * (0.0104)
p-vaule = 0.0208
Therefore, p-value (0.0208) is less than alpha = 0.05 reject H0.
Yes you will regroup because 8+3 equals 11 so you would bring the 1 down and add the other to the 4 and 2
Answer:
The answer to your question is time = 20 min
Step-by-step explanation:
Data
Candace = 480 ft/min
time = 5 min
Brother = 660 ft/min
Process
1.- Calculate the distance traveled by Candace in 5 min
distance = speed xtime
= 480 x 5
= 2400 ft
2.- Write the equations to help solve the problem
Candace distance = 2400 + 480t
Brother distance = 600t
3.- Solve by equality
2400 + 480t = 600t
2400 = 600t - 480t
2400 = 120t
t = 2400/120
t = 20 min
4.- I will solve the equation given
480t = 660(t - 112112)
480t - 660t = -112112
-120t = -112112
t = -112112/-120
t = 934 h I think there is a mistake in the formula you
wrote.
Answer:
Part A
Please see attached the required stem and leaf plot
For the stem and leaf plot, the nonsplit system is used because of clarity for analysis
Part B:
From the shape of the stem and leaf plot we have that there is an average increase of pulse rate of 20 pulses in all the 19 students after the exercise
The shape of the plot is relatively the same for the before and after exercise save for the decrease in the third to the last row by one and the increase in the second to the last roe by one student
The spread remained relatively constant in both cases with the most being in the 60s range having 7 students in the before exercise and the 80s range having 8 students in the after exercise leaf plot.
Step-by-step explanation:
The given data are;
67
87
67 88
67 89
68 89
71 91
72 93
72 93
75 95
77 96
77 97
79 98
81 98
85 101
87 105
87 105
91 119
97 125
103 125
121 147
